Sports Illustrated swimsuit model Kate Upton (L) with TV personality Guillermo at SI Swimsuit on Location at the Marquee Nightclub at The Cosmopolitan of Las Vegas on February 13, 2013 in Las Vegas, Nevada.

Sports Illustrated swimsuit model Kate Upton (L) with TV personality Guillermo at SI Swimsuit on Location at the Marquee Nightclub at The Cosmopolitan of Las Vegas on February 13, 2013 in Las Vegas, Nevada.

Sports Illustrated swimsuit model Chrissy Teigen and musician John Legend attend SI Swimsuit on Location at the Marquee Nightclub at The Cosmopolitan of Las Vegas on February 13, 2013 in Las Vegas, Nevada. (Photo by Michael Loccisano/Getty Images for Sports Illustrated) less

Sports Illustrated swimsuit model Chrissy Teigen and musician John Legend attend SI Swimsuit on Location at the Marquee Nightclub at The Cosmopolitan of Las Vegas on February 13, 2013 in Las Vegas, Nevada. ... more

Sports Illustrated swimsuit models Jessica Perez (L) and Adaora attend SI Swimsuit on Location at the Marquee Nightclub at The Cosmopolitan of Las Vegas on February 13, 2013 in Las Vegas, Nevada. (Photo by Michael Loccisano/Getty Images for Sports Illustrated) less

Sports Illustrated swimsuit models Jessica Perez (L) and Adaora attend SI Swimsuit on Location at the Marquee Nightclub at The Cosmopolitan of Las Vegas on February 13, 2013 in Las Vegas, Nevada. (Photo by ... more

In this photo provided by the Las Vegas News Bureau, 2013 Sports Illustrated Swimsuit Issue model Alyssa Miller walks the red carpet at Caesars Palace, Wednesday, Feb. 13, 2013, in Las Vegas. The models currently featured in the 2013 SI Swimsuit Issue are in Las Vegas for three days of autograph signings and events. (AP Photo/Las Vegas News Bureau, Brian Jones) less

Sports Illustrated swimsuit model Kate Upton attends SI Swimsuit on Location at the Marquee Nightclub at The Cosmopolitan of Las Vegas on February 13, 2013 in Las Vegas, Nevada. (Photo by Michael Loccisano/Getty Images for Sports Illustrated) less

Sports Illustrated swimsuit model Kate Upton attends SI Swimsuit on Location at the Marquee Nightclub at The Cosmopolitan of Las Vegas on February 13, 2013 in Las Vegas, Nevada. (Photo by Michael ... more